Drill



H. J. KIMMAN.

DRILL.

APPLICATION FILED AUG.21, 1919.

1,385,458. Patented y 26,1921.

2 SHEETS-SHEET 2.

- UNITED STA HENRY J. VKIVMMAIIN', or oLnvEnAivn'oHIo,

COMPANY, or CHICAGO, ILLInoIs,

ASSIGNOR TO CHICAGO PNEUMAT C TOOL A CORPORATION OF NEW JERSEY.

DRILL.

- V Specification of Letters Patent. Patented July 26 1921 Applicationfiled August 21, 1919. Serial No. 318,935.

To all whom it may concern Be it known that I, HENRY J. KIMMAN, acitizen of the United States, residing at Cleveland, in the county ofCuyahoga and State of Ohio, have invented certainnew and usefulImprovements in Drills, of which the following is a specification. 1 Myinvention relates to fluid pressure drills and more particularly to thattype knownas close-quarter or corner drills. object of my invention isto provide a simple. and efficient, as, well as compact construction ofdrill of this character, such in construction and arrangement of thegearing between the power shaft and the drill The various featuresuofadvantage construction of drill will the description hereinafterspindle. and utility in my be apparent from given.

In the drawings Figure 1 is a longitudinal sectional elevation of drillembodying my invention and Fig. 2 a section on the line 2-2 of Fig. 1.

Referring to the embodiment of my invention as herein shown the drillbody comprises a main casing 1 and an end casing orcap 2, within whichbody are contained the operating parts or engines and the drill spin dletogether with the intermediate operating connections.

Within the drill body are arranged a plurality of engines consisting ofcylinders 3 within the cap 2, pistons 4 within such cylinders, a maindriving shaft in the form of a crank shaft 5, and connecting rods 6 andpiston rods 7. The crank shaft is supported in bearings 8 and 9 arrangedwithin the main body or casing of the drill and the extreme right handend of such shaft is fashioned as or provided with a pinion, 10.

The pinion 10 is adapted to drive a main intermediate shaft 11 which isof novel construction andarrangement. As shown this shaft 11 has a stemor shaiikportioii and an enlarged gear wheel portion 12, the lattermeshing with the pinion 10. The extreme left hand end portion of theshaft 11 is plain and mounted in a bearing 13 within the main casing.The intermediate portion of this stem is fashioned as or provided with apinion 14 while the portion intervening between.

' The the gear teeth 26 on the periphery .ported in bearings 16 whichare here roller bearings, the same as the bearings 8 and 9.

The side of the main casing adjacent this main intermediate shaft andgear wheel 12 is made removable as by means of the side plate v17removably connected to the main casing, with the result that this shaft,etc.,

may'be readily removed for inspection, re-

pairs, or replacement.

The pinron 14 is adapted to mesh with a secondary intermediate shaftwhich is here 'in the form of a hollow sleeve 18 loosely mounted upon ashaft 19 which is supported vention pertaining more particularly to the,at itsends in the main casing. This sleeve meshes. wahin this head arelocated the :bearings 21 which are here roller bearings. ;The' shaft 19is stationary and prevented from rotating by means of its shouldered end22 adapted to contact with a shoulder 23 in the inner side of the maincasing. Such shaft is prevented from moving longitudinally out of placeby means of the screw plug 24.

The sleeve portion of this secondary shaft, that is the left hand endportion, is provided with pinion teeth 25 adapted to mesh with of thedrill spindle 27. This spindle is suitably mounted in the usual mannerin the extreme end of the main casing and also is provided with theusual feed screw 28.

By the construction above described I provide a simple and efficientstructure and a well-balanced and effective means for transmitting thepower from the crank shaft of the engine to the drill spindle.

I claim:

1. A drill of the class described, comprising a casing, an enginetherein including a main driving shaft, a drill spindle supported by thecasing and operating connections between said shaft and spindleincluding a pinion at one end of the main driving shaft, a bearing forsaid shaft coacting with one end thereof and a second bearing for theshaft engaging an intermediate surface of said shaft, a mainintermediate shaft mounted within the casing and having at one end agear meshing with said pinion and pro vided intermediate its length witha pinion, a bearing for one end of said intermediate shaft, and a secondbearing for said shaft cooperating therewith between the pinion and gearthereon, and a secondary shaft mounted within the casing and havingdisposed thereon a gear meshing with the pinion of theinain intermediateshaft and also having a pinion, and a gear portionon said spindlemeshing with said last mentioned pinion.

2. A drill of the character described, comprising a casing, an enginetherein and a main driving shaft, a drill spindle and operatingconnections between said shaft and spindle consisting of a piniondisposed at one end of the shaft, bearings for said main driving shaft,one of said hearings coopcrating with the shaft intermediate its endsand the other bearing engaging said shaft at one end thereof, a mainintermediate 7 shaft mounted within said casing and comprising a stemhaving two separated plain having a gear thereon with which theintermediate pinion of the main intermediate shaft meshes, and a secondgear on said secondary shaft havin a driving connection with thespindle, sald casing having a removable closure for permitting access tobe had to the cooperating gears on the main.

drive shaft and the main intermediate shaft.

ing at one end a gear meshing with said pinion and intermediate itslength a pinion, a secondary intermediate shaft mounted in the casingand having a gear meshing with the pinion of the main intermediate shaftand also a driven pinion connected with said gear, a spindle rotatablymounted within the casing, and a gear on said spindle driven by saidlast mentioned gear on the secondary shaft, said casing being providedalong one side with a removable closure to permit access to be had tothe meshing pinion on the main drive shaft and the gear on the mainintermediate shaft.

HENRY J. KIMMAN.

